<template>
	<view class="nav">
		<!-- 状态栏 -->
		<view :style= "'height:' + status + 'rpx;' + containerStyle"></view>
		<view v-if="isHome" class="headNav" :style="'height:'+ navHeight + 'rpx;line-height:'+ navHeight + 'rpx;padding-left:20rpx'" >
			<text class="city">中部地区</text>
			<view style="flex:1">
				<navigator
					url="../../pages/search/index"
					:style=" 'height:'+ menu.height*2 + 'rpx;line-height:'+ menu.height*2 + 'rpx;margin-top:'+ (menu.top*2 - status) + 'rpx;margin-left:32rpx;margin-right:'+ (menu.width*2 + 24) + 'rpx;background:#f4f4f4;border-radius:200rpx;text-align:center'"
				>
					<text class="search-text">找医院</text>
				</navigator>
			</view>
		</view>
		<!-- 内容 -->
		<view v-else class="navbar" :style= " 'height:' + navHeight +'rpx;' + containerStyle">
			<view class="back-icon" @click="backHome">
				<image v-if="pages > 1" src="../../static/resource/navbar/ic_back.png" mode=""></image>
				<image v-else src="../../static/resource/navbar/ic_home.png" mode=""></image>
			</view>
			<view class="nav-title" v-if="titleText">
				<view :style=" 'height:' + navHeight + 'rpx;line-height:'+ navHeight + 'rpx;'+ textStyle ">{{titleText}}</view>
			</view>
		</view>
	</view>
</template>

<script setup>
	import { ref,reactive,onBeforeMount,defineProps } from 'vue'
	const props = defineProps({
		background:{
			type:String,
			default:'rgba(255,255,255,1)'
		},
		color:{
			type:String,
			default:'rgba(0,0,0,1)'
		},
		fontSize:{
			type:String,
			default: 32
		},
		iconWidth:{
			type:String,
			default: 116
		},
        iconHeight:{
        	type:String,
        	default: 38
        },
		titleText:{
			type:String,
			default: ''
		},
		isHome: {
			type:Boolean,
			default:false
		}
	})
	//状态栏高度
	const status = ref(0)
	//内容高度
	const navHeight = ref(0)
	//背景颜色
	const containerStyle = ref('')
	//字体样式
	const textStyle = ref('')
	//图标样式
	const iconStyle = ref('')
	//页面栈数量
	const pages = ref(getCurrentPages().length)
	//获取胶囊的位置
	const menu = reactive(uni.getMenuButtonBoundingClientRect())
	
	onBeforeMount(()=>{
		setNavSize()
		setStyle()
	})
	//计算状态栏高度
	const setNavSize = ()=>{
		const { statusBarHeight,system } = uni.getSystemInfoSync()
		status.value = statusBarHeight * 2
		const isIOS = system.indexOf('iOS') > -1
		if( !isIOS ){
			navHeight.value = 96  //非ios
		}else{
			navHeight.value = 88  //ios
		}
	}
	//样式设置
	const setStyle = ()=> {
		containerStyle.value = ['background:'+ props.background].join(';')
		textStyle.value = ['color:'+ props.color,'font-size:'+props.fontSize+'rpx'].join(';')
		iconStyle.value = ['width:'+ props.iconWidth + 'rpx' , 'height:'+ props.iconHeight +'rpx'].join(';')
	}
	const backHome = ()=> {
		if(pages.value > 1){
			uni.navigateBack()
		}else{
			uni.switchTab({
				url:'/pages/index/index'
			})
		}
	}
</script>

<style>
.nav{
	position: fixed;
	width: 100%;
	top: 0;
	left: 0;
	z-index: 2;
}
.back-icon{
	display: flex;
	align-items: center;
	width: 64rpx;
	height: 100%;
	margin-left: 20rpx;
}
.back-icon image{
	width: 64rpx;
	height: 64rpx;
}
.navbar{
	position: relative;
}
.nav-title{
	position: absolute;
	top: 0;
	left: 50%;
	transform: translate(-50%)
}
.headNav{
	display: flex;
}
.city {
    display: inline-block;
    position: relative;
    font-size: 30rpx;
    font-weight: bold;
    padding-left: 55rpx;
    background: url()
        no-repeat left center;
    background-size: 40rpx;
}

.city:after {
    content: ' ';
    display: inline-block;
    height: 6px;
    width: 6px;
    border-width: 1px 1px 0 0;
    border-color: #353535;
    border-style: solid;
    -webkit-transform: matrix(0.71, 0.71, -0.71, 0.71, 0, 0);
    transform: matrix(0.71, 0.71, -0.71, 0.71, 0, 0);
    position: relative;
    top: -2px;
    position: absolute;
    top: 50%;
    margin-top: -4px;
    right: -10px;
}
.search-text {
    display: inline-block;
    padding-left: 30rpx;
    color: #bbbbbb;
    font-size: 26rpx;
    background: url()
        no-repeat left center;
    background-size: 23rpx;
}
</style>